Starting with this cool Chuck shelves: the six very flexible plywood planks (4mm thick) that can bend around your possessions – ideally books (to the tune of €850:).
And follow this link to see the largest collection of the best and most interesting bookshelves in the world. If you’re a book-lover it’s a feast for the eye and the mind. This one below is my favourite, since I only own ebooks now (read how I digitised all my library).